Cairn
NousResearch/hermes-agent

Fixes for dropped tool results due to ID mismatches

Cluster 63000 · agent. Data as of

Nothing open on GitHub. Fix merged in #93329. Check it covers your case.

The short answer

0open issues
0open PRs
5items grouped
Known?
Yes. 5 related items grouped here, 1 issue already closed.
Fix event
A fix was merged to main in PR #93329. Check it covers your case. No release data is tracked.
Tracker
The maintainers' tracker marks this resolved, deciding PR #93329. That is separate from the fix event.
Still open
Nothing open on GitHub.

These issues and fixes address a bug where tool results are silently dropped when tool call IDs have composite or variant formats (e.g., 'call_xxx|fc_yyy'), causing the model to never receive tool output. The work focuses on normalizing and correctly pairing tool call IDs across multiple matching sites in the agent pipeline.

Open issues0

No open issues.

Open PRs0

No open pull requests.

Fixes on record

Merged to main. A stamp counts the issues a fix is linked to.

  • #93329 fix(agent): tool results survive divergent id/call_id variants at all four pairing sites (#93251, salvages #56148 #58287 #66974 #91768)

    merged to main

    files: agent/agent_runtime_helpers.py, agent/context_compressor.py, tests/agent/test_context_compressor.py, tests/run_agent/test_message_sequence_repair.py, tests/run_agent/test_run_agent.py

  • #93401 fix(agent): composite and response_item_id spellings pair correctly; results born on canonical ids (#63000, salvage #93335)

    merged to main

    files: agent/agent_runtime_helpers.py, agent/context_compressor.py, agent/conversation_loop.py, agent/message_sanitization.py, agent/tool_dispatch_helpers.py, agent/tool_executor.py, tests/agent/test_tool_dispatch_helpers.py, tests/run_agent/test_message_sequence_repair.py

2 PRs closed without merging

From the close comments: merged via another change 1 · other 1

  • #63005 fix(agent): normalize composite tool_call ids to prevent silent tool result drops · other → a2a43f7, #63000, #93401, #93329
  • #93335 fix(agent): preserve parallel tool results across ID variants · merged via another change → a2a43f7, #93401, #93329, #79278, #91768, #63000
Closed issues · 1
  • Closed#63000Tool results silently dropped when provider returns composite tool_call ids (call_xxx|fc_yyy) — model never sees output and confabulates
How this cluster was grouped
  • Link evidence (structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
  • Pairwise link density 0.40: the share of item pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. 1.00 means every pair is linked.

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At a glance

Subsystem
agent
Merged PRs
#93329, #93401
Closed issues
1
Attempts
2 PRs closed without merging
Fix link checked
24 Aug 2026

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